How To Build Up Chest Muscle?

The best way to build up chest muscle would be joining a good gym and training under an equally good instructor who could guide one in the nuances of body building and chest muscles in particular. Proper diet and fluid intake are essential components of an effective muscle building program.  

Exercises like push-ups or training with weights and doing bench press with increasingly heavy weights under supervision would certainly help. Ideally doing bench press by keeping the bench inclined at an angle of 30 degrees and then doing 3 to 4 sets of 8 to 12 reps would be advisable breathing is an important factor while doing bench press.

Dips similar to push ups, with the feet elevated with the help of chairs and the arms resting on boxes at a slightly lower level are another exercise guaranteed to build chest muscles. Best results can be obtained if one starts training slowly and then gradually builds momentum. One would be better off if one did stretching exercises before and after any weight sessions and then taking a break of at least 24 hours for optimum performance.

Here's an interesting muscle building site with lots of videos.